Measurements of Direct CP Violating Asymmetries in Charmless Decays of Strange Bottom Mesons and Bottom Baryons
We report measurements of direct CP—violating asymmetries in charmless decays of neutral bottom hadrons to pairs of charged hadrons with the upgraded Collider Detector at the Fermilab Tevatron. Using a data sample corresponding to 1 fb-1 [fb superscript -1] of integrated luminosity, we obtain the f...
| Main Authors: | , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society
2011
|
| Online Access: | http://hdl.handle.net/1721.1/65855 https://orcid.org/0000-0002-6047-4211 |
| _version_ | 1811090276802887680 |
|---|---|
| author | Gomez-Ceballos, Guillelmo Goncharov, Maxim Makhoul, Khaldoun Paus, Christoph M. E. Bauer, Gerry P |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Gomez-Ceballos, Guillelmo Goncharov, Maxim Makhoul, Khaldoun Paus, Christoph M. E. Bauer, Gerry P |
| author_sort | Gomez-Ceballos, Guillelmo |
| collection | MIT |
| description | We report measurements of direct CP—violating asymmetries in charmless decays of neutral bottom hadrons to pairs of charged hadrons with the upgraded Collider Detector at the Fermilab Tevatron. Using a data sample corresponding to 1 fb-1 [fb superscript -1] of integrated luminosity, we obtain the first measurements of direct CP violation in bottom strange mesons, ACP(Bs0→K-π+)=+0.39±0.15(stat)±0.08(syst) [A subscript CP (B superscript 0 subscript s → K superscript - pi superscript +)=+0.39±0.15(stat)±0.08(syst)], and bottom baryons, ACP(Λb0→pπ-)=+0.03±0.17(stat)±0.05(syst) [A subscript CP (Lambda superscript 0 subscript b → p pi superscript -) =+0.03±0.17(stat)±0.05(syst)] and ACP(Λb0→pK-)=+0.37±0.17(stat)±0.03(syst) [A subscript CP (Lambda superscript 0 subscript b → pK superscript -) =+0.03±0.17(stat)±0.05(syst)]. In addition, we measure CP violation in B0→K+π- [B superscript 0 → K superscript + pi superscript -] decays with 3.5σ [3.5 delta] significance, ACP(B0→K+π-)=-0.086±0.023(stat)±0.009(syst) [A subscript CP (B superscript 0 → K superscript + pi superscript -) =-0.086±0.023(stat)±0.009(syst)], in agreement with the current world average. Measurements of branching fractions of Bs0→K+K- [B superscript 0 subscript s →K superscript + K superscript - and B0→π+π- [B superscript 0 → pi superscript + pi superscript -] decays are also updated. |
| first_indexed | 2024-09-23T14:40:38Z |
| format | Article |
| id | mit-1721.1/65855 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:40:38Z |
| publishDate | 2011 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/658552023-02-26T06:02:53Z Measurements of Direct CP Violating Asymmetries in Charmless Decays of Strange Bottom Mesons and Bottom Baryons Gomez-Ceballos, Guillelmo Goncharov, Maxim Makhoul, Khaldoun Paus, Christoph M. E. Bauer, Gerry P Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Paus, Christoph M. E. Bauer, Gerry P. Gomez-Ceballos, Guillelmo Goncharov, Maxim Makhoul, Khaldoun Paus, Christoph M. E. We report measurements of direct CP—violating asymmetries in charmless decays of neutral bottom hadrons to pairs of charged hadrons with the upgraded Collider Detector at the Fermilab Tevatron. Using a data sample corresponding to 1 fb-1 [fb superscript -1] of integrated luminosity, we obtain the first measurements of direct CP violation in bottom strange mesons, ACP(Bs0→K-π+)=+0.39±0.15(stat)±0.08(syst) [A subscript CP (B superscript 0 subscript s → K superscript - pi superscript +)=+0.39±0.15(stat)±0.08(syst)], and bottom baryons, ACP(Λb0→pπ-)=+0.03±0.17(stat)±0.05(syst) [A subscript CP (Lambda superscript 0 subscript b → p pi superscript -) =+0.03±0.17(stat)±0.05(syst)] and ACP(Λb0→pK-)=+0.37±0.17(stat)±0.03(syst) [A subscript CP (Lambda superscript 0 subscript b → pK superscript -) =+0.03±0.17(stat)±0.05(syst)]. In addition, we measure CP violation in B0→K+π- [B superscript 0 → K superscript + pi superscript -] decays with 3.5σ [3.5 delta] significance, ACP(B0→K+π-)=-0.086±0.023(stat)±0.009(syst) [A subscript CP (B superscript 0 → K superscript + pi superscript -) =-0.086±0.023(stat)±0.009(syst)], in agreement with the current world average. Measurements of branching fractions of Bs0→K+K- [B superscript 0 subscript s →K superscript + K superscript - and B0→π+π- [B superscript 0 → pi superscript + pi superscript -] decays are also updated. United States. Dept. of Energy National Science Foundation (U.S.) Alfred P. Sloan Foundation 2011-09-15T16:54:15Z 2011-09-15T16:54:15Z 2011-05 2011-02 Article http://purl.org/eprint/type/JournalArticle 0031-9007 http://hdl.handle.net/1721.1/65855 Aaltonen, T. et al. "Measurements of Direct CP Violating Asymmetries in Charmless Decays of Strange Bottom Mesons and Bottom Baryons" Physical review letters, v.106: issue 18 PRL 106, 181802 (2011) 2011 American Physical Society https://orcid.org/0000-0002-6047-4211 en_US http://dx.doi.org/10.1103/PhysRevLett.106.181802 Physical review letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Gomez-Ceballos, Guillelmo Goncharov, Maxim Makhoul, Khaldoun Paus, Christoph M. E. Bauer, Gerry P Measurements of Direct CP Violating Asymmetries in Charmless Decays of Strange Bottom Mesons and Bottom Baryons |
| title | Measurements of Direct CP Violating Asymmetries in Charmless Decays of Strange Bottom Mesons and Bottom Baryons |
| title_full | Measurements of Direct CP Violating Asymmetries in Charmless Decays of Strange Bottom Mesons and Bottom Baryons |
| title_fullStr | Measurements of Direct CP Violating Asymmetries in Charmless Decays of Strange Bottom Mesons and Bottom Baryons |
| title_full_unstemmed | Measurements of Direct CP Violating Asymmetries in Charmless Decays of Strange Bottom Mesons and Bottom Baryons |
| title_short | Measurements of Direct CP Violating Asymmetries in Charmless Decays of Strange Bottom Mesons and Bottom Baryons |
| title_sort | measurements of direct cp violating asymmetries in charmless decays of strange bottom mesons and bottom baryons |
| url | http://hdl.handle.net/1721.1/65855 https://orcid.org/0000-0002-6047-4211 |
| work_keys_str_mv | AT gomezceballosguillelmo measurementsofdirectcpviolatingasymmetriesincharmlessdecaysofstrangebottommesonsandbottombaryons AT goncharovmaxim measurementsofdirectcpviolatingasymmetriesincharmlessdecaysofstrangebottommesonsandbottombaryons AT makhoulkhaldoun measurementsofdirectcpviolatingasymmetriesincharmlessdecaysofstrangebottommesonsandbottombaryons AT pauschristophme measurementsofdirectcpviolatingasymmetriesincharmlessdecaysofstrangebottommesonsandbottombaryons AT bauergerryp measurementsofdirectcpviolatingasymmetriesincharmlessdecaysofstrangebottommesonsandbottombaryons |